A mess of personal information, including details about people's recent locations, phone numbers and search histories, was taken by the as-yet unidentified hackers.

After all, Facebook serves as an online identity for many people.

"For 15 million people, attackers accessed two sets of information - name and contact details (phone number, email, or both, depending on what people had on their profiles)," Facebook said in a blog post Friday.

"For 14 million people, the attackers accessed the same two sets of information, as well as other details people had on their profiles," the post said.

For anyone who's filled out a Facebook profile page, those "other details people had on their profiles" can amount to a lot of personal information: Stuff like your birthdate, where you went to school, who you're in a relationship with — even your religion. It all depends on what you volunteered to Facebook when you filled out your profile page.

Here's the full list of information that hackers might have gotten if you're one of the unlucky 29 million impacted people: